JPH01129326A - Program linkage system - Google Patents

Abstract

PURPOSE:To only execute of the replacement of the subject program of a changing part even in case of a still linking system and to obtain a high speed by providing a control data file, a control data file maintaining means, a changing influence resolving means and a module part renewing means. CONSTITUTION:The title system includes a control data file 1, a control data file maintaining means 2, a control means 3, a changing influence resolving means 4, a module part renewing means 5, a module renewing means 6, an address resolving means 7, a program input means 8, an external input display device 9, a module library 10 and a program library 11. Thus, even in case of the still linking system, since the replacement of only the subject program of the changing part can be executed, linking edition can be achieved with the replacement of the object of the subject program. Then, the high speed can be obtained.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention allocates a logical address for computer execution to an externally defined identifier included in a program object generated by a compiler independently performing translation processing.
The present invention relates to a program linking method that connects and edits computer-executable modules by resolving an external reference identifier that is associated with a program object with a logical address of a corresponding external definition identifier.

[Conventional technology]

In general, this type of program linking method includes a static linking method in which linking Wm is performed before program execution, and a dynamic linking method in which linking and editing are performed during program execution.

The prior art in the static connection method will be explained with reference to FIG. 1, which is a configuration diagram of an embodiment of the present invention. The management data file 1. Management data file maintenance means 2. It consists of the components excluding the change impact resolution means 4 and their related parts.

In other words, the static linking method in the prior art is to allocate logical addresses to external definition identifiers of programs for all programs that make up the module based on the entrance name of the program that is the entrance to the module, and to resolve each external reference identifier. . An example of this is shown in FIG.

In FIG. 4, for example, a program source 26 (ID=A) written in the C0BOL language is converted into a program object by the C0BOL compiler, but the contents of this program object 21 are the coded object skeleton of the object. , an external definition reference table that is a set of external definition identifiers 24 and a set of external reference identifiers 25 defined within this program.

The object 28 of the module has a logical address (ad
deon), and objects 30 (object A, object B) resolved by logical addresses. Figure 4 shows ID-A
, B is expressed as SYMDEF-A24°SYMREF-B25, and the format in which this is resolved as a module object is shown in the lower row.

[Problem that the invention seeks to solve]

The conventional static connection method described above has the following problems.

In recent years, programs have become more modularized, and it is common for one module to consist of many (number of) program parts. However, in the conventional static linking method, it is not possible to locally update a part of a module. However, it is necessary to reconnect all the constituent programs.In other words, since there is no management function to grasp the constituent elements of the part affected by changes in the update program, there is a problem that a module cannot be created unless all the constituent elements are reattached. there were.

A conventional alternative to solve the above problems is to adopt a dynamic concatenation method, but in general, the dynamic concatenation method increases the dynamic overhead at runtime due to the concatenation editing at runtime. There is a problem that performance is degraded.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a program linking method that allows only the UIA of the target program to be changed even in the case of a static linking method.

[Means for solving problems]

In order to achieve the above object, the present invention allocates a logical address for execution on a computer to an externally defined identifier included in a program object generated through independent translation processing by a compiler, and In a program linking method that connects and edits modules executable on a computer by resolving an identifier with a logical address of a corresponding externally defined identifier, the program input means inputs a program object from a library in which the program object is stored; address resolution means for assigning an execution logical address to an externally defined identifier included in a program object inputted by the input means and resolving an external reference identifier with a logical address; and outputting and generating a module object to a library in which the module object is stored. A module update means, and in connection with the program linking process, at least the external definition identifier defined by the program, the relative position within the program of the external definition identifier, the external reference identifier with respect to another program, and the relative position within the program of the external reference identifier. A management data file records the position of the module, and records the program configuring the module and the logical address assigned to the program. and a management data file maintenance means for updating; and a change influence resolving means for obtaining information on other components in the same module caused by replacement of a target program set when replacing a part of a program constituting the module from the contents of the management data file; It has module partial update means for inputting a module from a library in which module object 1- is stored and updating a part of it, and control means for controlling module creation.

[Effect]

By providing a management data file, a management data file maintenance means, a change impact resolution means, and a module part update means, it is possible to understand and manage the components of the modified C part of the update program, without having to reconnect all the components. It is also possible to create modules.

〔Example〕

Next, embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing the configuration of an embodiment of the present invention, in which management data files 1. Management data file maintenance means 2. Control means 3. Change impact resolution means 4. Module partial update means 5. Module update means 6゜Address resolution means 7. Program input means 8. External input display device9. It includes a module library 10 and a program library 11.

The control means 3 inputs instructions designated by the user through the external input display bag '119, analyzes them, and divides them into the following cases.

(1) Instructs to edit a new connected module (2) Specifies a specific program and instructs a collection of partial connections i and g of an existing module (3) Instructs control means 3 to edit a whole connected module, although it is not a new module In the case of (3) above, control is performed in the same way as fil.

First, the processing in the case of (11, (3)) above will be described.

The control means 3 inputs program objects from the program library 11 through the program input means 8 .

Next, the external definition identifier (hereinafter simply referred to as external definition) (SYMDEF) included in the manually created program object is
) and external reference identifiers (hereinafter simply referred to as "external references") (
SYMREF), control is passed to address resolution means 7.

The address resolution means 7 solves this problem by allocating a new logical address (addcon) for external definitions and setting the logical address of the corresponding external definition to the reference position for external references.

Also, as part of the above processing, for a program, at least the external definition defined by the program, the relative position within the program of this external definition, the external reference to other programs, and the relative position within the program of this external reference,
Regarding the module, the program constituting the module and the logical address assigned to this program are respectively set in the management data file 1 by the management data file maintenance means 2 for the next reconnection of the same module.

The above process is repeated until there are no unresolved external references in the input program library 11. The module updated in this manner is then stored in the module library 10 by the module updating means 6.

As a result of the above, the constituent elements constituting the module and the relationship data between the elements are set and held in the management data file 1 at the same time as the connected editing is performed.

Next, the case of (2) described above will be described.

When the control means 3 recognizes that it is a partial update specification for a program in an existing module, it passes control to the change impact resolution means 4 in order to determine whether the updated program is included as a component in the target module.

Change impact resolution means 4 is management data file maintenance means 2
It is determined whether or not the designated program is included in the configuration program field of the target module, and the control means 3 is notified of the result.

If the control means 3 finds that the designated program is not included in the target module as a result of the above-mentioned determination, it skips the processing of that program and performs the next processing. Control is again passed to the change influence resolution means 4 in order to perform the partial update Wm.

The change impact resolution means 4 determines the range of influence exerted by the replacement of the specified program using the following procedure, and updates related elements using the module partial update means 5. This operation will be explained below with reference to FIG. 2, which is an explanatory diagram of an embodiment of the present invention that shows components affected when program B is updated and replaced and their matching. In addition, the second
In the figure, 31.36 is the program name, 32.37
is an external definition.

33 and 38 are defined relative positions, 34 is an external reference, 35 is a reference relative position, 39 is a module name, 40 is a configuration program, 41 is an address constant, and 42 is a configuration address constant.

43 is an address constant table, and 44 is an object.

(1) Search for the entry of the target program using the format=program management data, and update the information in this entry with that of the new program. That is, search for the entry of program name 36 in FIG. 2 in program B, and search for its external definition 37.
And the defined relative position rI138 is updated to B, α2°.

(2) Updating the module object corresponding to externally defined management data; Obtain the old object B from the address constant table 43, which is a management table of logical addresses of module objects, and replace it with the new object B''.

(3) Updating external references that refer to external definitions: By replacing the external definition of program B, it is necessary to match the external references of other programs that refer to this external definition.

In this case, the value of the external reference field in the format #program data of management data file 1 is searched for the external definition to be replaced, and the internal relative position indicated by the value of the reference relative position field of the searched target is This is accomplished by updating the location with a new logical address. That is, search for the entry of the external reference 34 whose external reference field field is B, find the reference relative position β1, and add the externally defined logical address addcon-B' of B to the relative position of β1 of object A. This is achieved by setting.

(4) Format - update of module management data; each field of configuration program, address constant, and configuration address constant is updated, and the address constant table 43 corresponding thereto is updated.

The embodiments of the present invention have been described above according to the order of their operation, and the effectiveness of the present invention will be described below with reference to FIG. 3. In addition, in FIG. 3, A to F and C' are programs.

FIG. 3 is a diagram illustrating the external references coming from the main program A as a base point, and link editing is a process of following the lines in this diagram and combining the entire program into one module. The effectiveness of the present invention in the case of replacing the program constituting this module will be explained assuming that the module configuration before update is as shown in FIG. 3(1).

・Case 1 (substituted C-C', no effect on others; Figure 3 (
Case 2) This example represents a local modification of a code portion of a program. That is, this is a case where the external definitions and external references remain the same as before, and in this case, connected editing is performed only by replacing the target program. Therefore, this can be accomplished only by replacing the object of the program to be replaced.

- Case 2 (replaced with C-C', updated reference position of A; case of FIG. 3 (3)) This example shows a case where the external definition is changed but the external reference is not changed. In this case, it is necessary to adjust the external reference that refers to the external definition that is the target of replacement.0For example, the figure shows a case where program C is the target of replacement, and in this case, It is necessary to make an adjustment to set a new address at the location, but it should be noted that this does not involve re-inputting to the program.Therefore, the replacement is possible without much difference from case 1.

・Case 3 (replacement with "C-C", input of F and address resolution; case of Figure 3 (4)) In this example, the replacement target involves a change in external references. In this case, a new Since it refers to an external definition, the input and address resolution processing is applied to it in the same way as for new processing. However, it is effective in this case as well because it does not require any more overhead than in the case of new processing. You can say that.

(Effects of the Invention) As explained above, even in the case of the static linking method, the present invention enables 1ZIA of only the target program of the changed portion, and therefore has the following effects.

(1) Normally, in the process of debugging a program, corrections due to bugs in the program are mostly local. Therefore, since connected editing can be achieved by replacing objects in the target program, speeding up is possible.

(2) Since only the changed portion is replaced and the entire portion is not connected and edited, it is possible to avoid accidentally making changes other than the updated portion during the process.

Therefore, there is no need to check for that purpose. Therefore, the former improves the quality of the created module, and the latter improves productivity.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of an embodiment of the present invention, Fig. 2 is an explanatory diagram of the operation of the embodiment of the present invention, Fig. 3 is a diagram for explaining the present invention in detail, and Fig. 4 is a diagram of the prior art. It is an explanatory diagram. In the figure, 1...Management data file 2...Management data file maintenance means 3...Control means 4...Change shadow resolution means 5...Module partial update means 6...Module update means 7 ... Address resolution means 8 ... Program input means 9 ... External input display device 10 ... Module library 11 ... Program library

Claims (1)

[Claims] A compiler independently performs translation processing and assigns a logical address for execution on a computer to an external definition identifier included in a program object generated, and a corresponding external address is assigned to an external reference identifier included in the program object. In a program linking method that connects and edits modules executable on a computer by resolving logical addresses of definition identifiers, the program input means inputs program objects from a library in which the program objects are stored; an address resolution means that assigns an execution logical address to an externally defined identifier included in a program object and resolves an external reference identifier with a logical address; a module update means that outputs and generates a module object to a library in which the module object is stored; Along with the program linking process, for a program, at least an external definition identifier defined by the program, a relative position within the program of the external definition identifier, an external reference identifier with respect to another program, and a relative position within the program of the external reference identifier are recorded; Regarding modules, there is a management data file that records the programs that make up the module and the logical addresses assigned to the programs, and management data that searches and updates the contents of the management data file using part of the recording field as a key. a file maintenance means; a change influence resolving means for obtaining, from the contents of the management data file, information on other components in the same module caused by replacement of a target program set when replacing a part of a program constituting the module; A program linking method comprising a module partial update means for inputting a module from a library and updating a part of the module, and a control means for controlling module creation.